Art of forming mantle-supports.



No. 836,123. PATENTED NOV. 20, 1906.

c. M: LUNGBBN. ART OF FORMING MANTLE SUPPORTS.

APPLIOA'IYION FILED MAR. 6, 1905.

WITNESSES: INVE TOR UNITED STATES PATENT oEEIoE.

CHARLES M. LUNGREN, OF'BAYONNE,NEW JERSEY, AssIGNoRTo THE.

SAFETY cAR HEATING & LIGHTING COMPANY, A CORPORATION or NEW JERSEY.

ART OF FORMING. MANTLE-SUAPPORTS- Specification of Letters Patent.

llpplication filed March 6, 1905. Serial No. 248,511-

Patented Nov. 20, 1906.

To all whom itmay concern:

Be it known that I, CHARLES M. LUNGREN,

residing at Bayonne, in the county of Hudson and State of New Jersey, have invented This invention relates to an art for forming means adapted for use in supporting incandescent-lamp mantles.

One of the objects thereof is to'provide an art of the above nature whereby an efficient supporting member may readily be formed of inexpensive material.

Another object is to provide an art of the above nature which may be carried on without the use of skilled labor and whereby a high rate of production is practicable.

Other objects will be in part obvious and in part pointed out hereinafter.

The invention accordingly consists in the several steps, the order of the same, and the. relation of one or more of the same to one or ,more of the others thereof, which will be exemplified in the art hereinafter described and the scope of the application of which will be lndicated in the following claims.

In the accompanying drawings, wherein is illustrated one of various possible methods of carrying on my invention, Figure 1 is a pers ective viewof one of the early steps thereo Fig. 2 is a sectional elevation showing means for carrying on a subsequent step. .Flg. 3 is a similar view of the same parts at a later stage in their use. Fig. 4 is a plan of the parts shown in Figs. 2 and 3.

Similar reference characters refer to similar parts throughout the several views.

As tending to cast light upon the general nature of my invention, itmay here be noted that the parts-used in supporting incandescent-lamp mantles are subjected to wide variations in tern erature and also'are exposed to the effects 0 extreme heat. Also it. is desirable that parts of this type be characterized by a considerable degree of resilience, so 5.

asto renderthe same adapted to cushion the member or members sup orted thereon. I propose to provide an art or forming a memher which is well adapted to resist the above ple and inexpensive manner. The article so ormed, although adapted for many uses, is peculiarl suited for employment in the above re ation.

Referring now to the accompanying drawings, there is indicated in Fig. l a method of carrying on one of the early steps in the preferred em odiment of my invention. About a mandrel 1', which is provided with a cylindrical portion 2 and a threaded extension 3 of less diameter, I wind a strip of moist asbestos paper 4. in such manner .as to form a sleeve or spool 5 about the threaded ortion thereof. A sectional mold 6, preferab y com.- p'rising three parts, is then clamped about the spool, as shown in Fig. 2 of the drawings, and

a follower 7, threaded as shown at 8, turned down upon the threaded portion of the mandrel. The several sections of the mold 6 being held firml in position by any desired means, the fol ower is forced down, so as to compress the soft semiplastic fibrous substance between the threads of the mandrel andoutwardly against the walls of the mold, causing it to take the exact shape thereof. Mold 6 is provided at its lower ends with a shoulder or projection 9 of the form indicated in Figs. 2 and 3 of the drawings, and the upper portion of the follower 7 is recessed, as indicated at 10, so as to provide a beaded lower end of the spool. After the follower has been turned to the desired extent, the spool being compressed until its bulk is reduced, preferconditions and for forming the same in a sim- I ably, about one-half, the sectional mold is unclamped and removed, the follower drawn from the mandrel, and the spool 5 removed by turning along the threaded portion 3 of the mandrel. I It will be obvious that-it is immaterial whether this follower or mandrel be turned, it being essential only that a relative turning movement take place. With the spool in this firmly-compressed condition it is dried or baked until it possesses the de-.

sired rigid yet resilient characteristics. The

final step in this art is the reducing of the spool to the desired exact shape, as by filing.

It will thus be seen that I have provided an art well adapted to accomplish the objects above indicated and possessing many advantages in the matters of simplicity, economy,

and practicability. The asbestos fiber, owing to its thorough matting in the previous processes to which it is subjected in forming the pa er, is thoroughly intermingled and matte and upon being compressed in a wet condition, as above indicated, and subsequently baked or dried is formed into a rigid and yet resilient member which is well adapted to stand not only extremes.of tempera-- ture and sudden variations in temperature,

but also the effect of, moisture and severe mechanical stresses without warping, crackset forth are lost, as the fibers of the asbestos are not as thoroughly matted together as when asbestos paper is used. v

Another. meth d of practicing 'my invention lies in rolling the moistened'asbestos paper upon a mandrel of the desired shape and manipulating the same, as by means of hand-tools, in such manner as to form the beaded end and then laying on additional layers of narrower strips, so as to leave the desired groove. When this is done, however, the mere wetting of the paper is not considered sufiicient to form an entirely satisfactory spool, as when subjected to heat the outer layers thereof are likely to peel off.

I be used instead of water in f0 It is considered advisable, therefore, to use a binder which upon heating will act as a flux.

and notonly join each layer to those in. contact with which it lies, but on account of its thorough permeation ofjthe substance there of will also strengthen the material. As such a binder or cement I have found silicate of soda, commonly known as "water-glass, to be most satisfactory, though other materials which will flux with asbestos and yet notbecome brittle in use may be employed to attain this result. Moreover, water-glass may the molded spool, as first described; but this has been found to be unnecessa as on account of the extreme pressure to w 'ch the spool is subjected the use of water is found to be amply suflicient to accomplish the desired result, and the same is more readily accomplished if the use of watenglass is avoided.

A supporting member formed according to any of t e above methods of racticing my art is found to possess many esirable characteristics, some of which will be evident from the above description and some of which can be appreciated only through a full understanding of the conditions of practical use. As above indicated,-my art may be carried on without the employment of skilled labor or the use of expensive tools or materials, and a high rate of output is readily attained.

As my art could be carried on by means of various forms of apparatus and with certain apparent departures from the process above in the foregoing description or shown in the accompanying drawings shall be interpreted as illustrative and not in a limiting sense.

I desire it also to be understood that the language used in the following claims is intended to cover'all of the generic and specific features of ,the invention herein described tion which as a matter of language might be said to falltherebetween.

Having described my invention, whatl claim as new, and desire to secure by Letters Patent, is-

' 1. The art of forming a mantle-support which consists in superposing a plurality of layers of relatively thin fibrous material upon a mandrel, and then compressing the same into the desired shape.

2. The art of forming a mantle-support relatively thin moist asbestos layers upon a into the desired shape.

3. The art of forming a mantle-support which consists in superposing successive relatively thin layers of plastic asbestos upon a mandrel, impregnating the same with waterglass compressing the same into a shape havbestos paper upon a mandrel, and reducing the same to the desired shape.

which comprises winding 8. thin strip of moist asbestos paper about a mandrel, reducing the same to the desired shape, and drying the same. a

the same into the desired shape, and drying the same.

and all statements of the scope of the inven-.

the resultant mem- 7. The art of forming a mantle-support. which comprises winding a strip of moist as-.-

9. The art of forming a mantle support' which comprises winding a thin strip of .asbestos paper about a mandrel, compressing outlined, I intend that all matters set forth which consists in superposing a plurality of mandrel, and then compressing the same inga beaded end, and then drying and finishi I 8. The art of forming a mantle-support 10. The art of forming a mantle-support lower within said mold u on said mandrel, which comprises winding a strip of a fibrous, removing said blank, and rying the samerefractory substance in moist condition upon 15. The art of forming a mantle-support 3, 5 amandrel, compressing the same into the dewhich comprlses ap lymg externally to a sired shape about said mandrel, and hardensuitable mandrel a 1i rous material, placlng ing the same. said prepared mandrel in a mold, and forcing 11. The art of forming a mantle-support into the space between said mold and mani which comprises winding a thin strip of moist drel a follower, whereby said material will be 40 asbestos paper about a mandrel, compressing highly compacted and closely shaped to the the same about said mandrel into the desired contacting walls of said parts. shape, and drying the same. 16. The art of forming a mantle-support 12. The art 0 forming a mantle-support which comprises ap lying externally to a which comprises winding a strip of a fibrous, threaded mandrel a fibrous material, lacing 45 refractory material about a mandrel, sursaid prepared mandrel in a mold, an rotatrounding'the resultant blank with a mold, ing into the s ace between said mold and and compressin the same within said mold mandrel a fol ower, whereby said material I aboutsald man el. will be highly compacted and closely shaped 13. The art of forming a mantle-support to the contacting walls of said parts. '30 which comprises winding astrip ofmoist as- 17. The a t o forming a mantle-support bestos paper about a threaded mandrel, surcomprisin wrapping a threaded mandrel rounding the same with a mold, placing a folwith thin brous strips, lacing said wrapped lower upon the threaded ortion of sai manmandrel in a mold, an screwing a follower 'drel, and com ressing t e resultant blank alon said threaded mandrel and into said 55 within said mo d upon said mandrel by means mol .whereby the fibrous wrap ing Wlll be of said follower. highly compactedand contoured to the dey I 14. The art of forming a mantle-support sired shape. a which comprises windin a-strip of moist as- In testimony whereof I affix my signature bestos paper aboutthe t readed portion of a in the presence of two witnesses. 7

threaded mandrel to form a blank, surrou.nd CHARLES M. LUNGREN. ing the same with a mold,- placing a follower Witnesses: Y upon the threaded portion of said mandrel, K A. O. MOORE,

. compressing the blank by means of said fol- A. DIXON. a 

